入门配置

入门配置

1、cloud-gateway-gateway9527
2、POM

  <dependencies>
        <!--新增gateway-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>



    </dependencies>

3、YML

server:
  port: 9527
spring:
  application:
    name: cloud-gateway
  cloud:
    gateway:
      routes:
        - id: payment_routh #路由的ID，没有固定规则但要求唯一，建议配合服务名
          uri: http://localhost:8001   #匹配后提供服务的路由地址
          predicates:
            - Path=/payment/get/**   #断言,路径相匹配的进行路由

        - id: payment_routh2
          uri: http://localhost:8001
          predicates:
            - Path=/payment/lb/**   #断言,路径相匹配的进行路由


eureka:
  instance:
    hostname: cloud-gateway-service
  client:
    service-url:
      register-with-eureka: true
      fetch-registry: true
      defaultZone: http://eureka7001.com:7001/eure

4、主启动类

@SpringBootApplication
@EnableEurekaClient
public class GateWayMain9527 {
    public static void main(String[] args) {
            SpringApplication.run( GateWayMain9527.class,args);
        }
}

测试

希望看到的效果：我们目前不想暴露8001端口，希望在8001外面套一层9527。

1、启动7001
2、启动cloud-provider-payment8001
3、启动9527网关
4、添加网关前：访问http://localhost:8001/payment/get/31可以拿到结果
5、添加网关后：访问http://localhost:9527/payment/get/31也可以拿到结果。

Gateway网关路由有两种配置方式

1、yml：上面的方式就是yml

2、代码中注入RouteLocator的Bean

需求：访问http://localhost:9527/guonei就跳转到http://news.baidu.com/guonei（即通过9527网关访问到外网的百度新闻网址）

@Configuration
public class GateWayConfig {

    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder) {
        RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
//        相当于访问http://localhost:9527/guonei就是访问http://news.baidu.com/guonei
        routes.route("path_rote_sl",
                r -> r.path("/guonei").
                        uri("http://news.baidu.com/guonei")).build();
        return routes.build();
    }
}